Bit-stock



(No Model.)

A. H. REID.

' BIT STOCK.

Patented Dec. 12, 1882.,

gril/@ATCB @y Jj 2 `Alito? UNITED STATES PATENT OFFICE.

ALBAN H. REID, OF PHILADELPHIA, PENNSYLVANIA.

BIT-STOCK.

SPECIFICATION forming part of Letters Patent No. 268,938, dated December12, 1882.

Application filed July 24, 1882. (No model.)

' ing is a specification.

My invention relates to a device intended to take the place of theordinary bit-stock for operating wood-borin g tools, screw-drivers,drills, dac. The implement consists of a chuck or tool-holder attachedto a spirally-threaded spindle, which is rotated by means ofan outsidesleeve or body arranged to reciprocate thereon.

The principal aims of the invention are to adapt the device to turn thetool always in the same direction and avoid a backward rotation as thesleeve is drawn back, and to permit the operator to hold and steady-thetool Y during the boring operation. i

With these ends lin view the invention consists in combining with thebody or sleeve a tixed head, by which it is driven forward Land'prevented from turning, and a loose head,` or its equivalent, bywhichitis retracted and permitted to revolve freely around the tool-holdingspindle, which remains in the meanwhile at rest. The spindle is providedat its forward end with a loose collar or sleeve, by which it may beheld and the tool guided, subjectedto" 4and also provided atone end witha socket or chuck, B, of any desired form', to receive and hold theboring-tool or other instrument.

C represents a tubular sleeve or body, arranged to slide endwise overthe spindle, and provided in its lower end with anutorthreaded Surface,b, which engages with the spindle to rotate the same as the sleeveadvances there,

on. At its upper end the spindle has a head or collar, c, by which it isprevented 'from escapingfrom the sleeve. Theupper end of the sleeve isprovided with'a head or knob, D, fixed rmly thereon,and also,'below orin front of the same, with a second and loosely-revolving head, E, whichmay be secured in place by a collar, d, or in any other suitable manner.On the lower end of the spindle A there is secured a loosely-rotatingsleeve or handle, F, of a size and torm to be conveniently grasped bythe operator. In operating the device the operator, grasp ing the sleeveFin one hand, holds and steades the instrument and direct-s the tool tothe desired point. He then applies the pressure of his remaining hand orhis body to the head D, and, holding the same against rotation,forcesthe same forward, causing the sleeve to slide over the spindle andimpart thereto and to the tool a forward rotation. Relaxing his graspupon the head D and drawing outward upon the head'E, he causes thesleeve to slide outward to its original position, thesleeve, in sodoing, revolving loosely in the head E and around the spindle,permitting the latter and the tool therein to remain at rest. Itwill beseen that in this manner the tool is driven intermittingly in onedirection, instead of being turned alternately forward and backward.

By means of the non-rotating .sleeve E the pressure may be applied andgraduated and the tool guided with great nicety; but in the manufactureot' cheap stocks for coarse work the sleeve may be omitted.

The sleeve may be applied by constructing the chucks separately from thespindle, with a neck inserted through the sleeve and pinned fastin aholein the spindle, or any other equivalent constrnction employed.

While it is preferred to make use of the fast and loose heads on thesleeve, a single revolving head mounted loosely thereon, and connectedthereto by a pawl and ratchet, could be.

employed, thepawl beingin such casenrranged to lockthepa-rts togetherduring the advance of the sleeve.

Having thus described my invention, what I vclaim is l. In combinationwith the spirally-threaded spindle or tool-holder, the externalreciprocating sleeve and the two heads, one fast and the other looseupon the sleeve. t

2. In combination with the threaded spindle or tool-carrier, thereciprocating sleeve exposed and adapted to be held against rotation byhand, a loose head or handle applied to said 4. The combination ofthesleeve or body, 1o sleeve, as described, whereby the sleeve may thefast and loose handles, the threaded spinl 'ne retracted and permittedto revolve meandle, and the handle or collar loosely applied while uponthe spindle. to the forward end of the spindle.

3. The combination of the threaded spindle or tool-carrier, areciprocating sleeve or bodT ALBAN H' REID' for rotating the same, andthe loosely-rotating Witnesses: l collar F, applied to the forward endof the spin- GEORGE A. PAR SLOW, die independent of the reciprocatingsleeve. JOSHUA E. WILLS.

